AIMS To examine the hypothesis that right to left shunting occurs mainly in the lungs rather than through the fetal channels in neonates. METHODS Thirty two term babies requiring over 70% oxygen had daily colour Doppler echocardiograms until recovery. Measurements included left ventricular fractional shortening, right and left ventricular outputs, colour and pulsed Doppler ductal and atrial s...

BACKGROUND Pulmonary artery pressure (PAP) is an important marker in cardiovascular disorders, being closely associated with morbidity and mortality. Noninvasive assessment by Doppler echocardiography is recommended by current guidelines. So far, the reliability of this method has been assessed only in small studies with contradictory results. Therefore, the aim of this study was to analyze the...

we introduce the notion ofstrongly $alpha$-reversible rings which is a strong version of$alpha$-reversible rings, and investigate its properties. we firstgive an example to show that strongly reversible rings need not bestrongly $alpha$-reversible. we next argue about the strong$alpha$-reversibility of some kinds of extensions. a number ofproperties of this version are established. it is shown ...

in this paper, we introduce a class of rings which is a generalization of reversible rings. let r be a ring with identity. a ring r is called central reversible if for any a,b ∈ r, ab=0 implies ba belongs to the center of r. since every reversible ring is central reversible, we study sufficient conditions for central reversible rings to be reversible. we prove that some results of reversible ri...

pulmonary arterial hypertension (pah) is a progressive disease with high morbidity and mortality rates. research has shown that pah has a prevalence rate of 10-79% in thalassemia major patients. this cross-sectional study was carried out in 2014 to determine the prevalence and risk factors of pah in all thalassemia major patients of over 18 years of age in ilam, iran. a cardiologist measured sy...

Abstract Funding Acknowledgements Type of funding sources: Foundation. Main source(s): Heart and Lung foundation Background The importance assessing right ventricular (RV) function in heart failure is well established. Methods evaluating intrinsic RV using Doppler echocardiography estimating -pulmonary coupling assessment might improve the understanding response due to increase afterload differ...

Introduction : Patients with hemodynamically significant mitral stenosis (MS) have prolonged P-wave duration and increased P-wave dispersion (PWD) that decrease after successful percutaneous balloon mitral valvotomy (PBMV). The purpose of this study was to investigate if the changes in these indices may predict a successful procedure. Methods : Fifty two patients with MS in sinus rhythm underwe...

BACKGROUND It is not known whether the mild hypoxia experienced by passengers during commercial air travel triggers hypoxic pulmonary vasoconstriction and increases pulmonary artery pressure in flight. Insidious pulmonary hypertensive responses could endanger susceptible passengers who have cardiopulmonary disease or increased hypoxic pulmonary vascular sensitivity. Understanding these effects ...

BACKGROUND The validity of Doppler echocardiographic (DE) measurement of systolic pulmonary artery pressure (sPAP) has been questioned. Recent studies suggest that mean pulmonary artery pressure (mPAP) might reflect more accurately the invasive pressures. METHODOLOGY/PRINCIPAL FINDINGS 241 patients were prospectively studied to evaluate the diagnostic accuracy of mPAP for the diagnosis of PH....

BACKGROUND/AIM To investigate the effects of pulmonary hypertension on early clinical variables in patients undergoing coronary artery bypass grafting surgery. MATERIALS AND METHODS The preoperative echocardiographic data of patients who underwent isolated coronary artery bypass surgery were evaluated retrospectively. A total of 1244 patients were included in the study. The patients were divi...